The slightest change in pH can destroy the substance or organism. The pH of a cell's interior helps regulate the cell's chemical reactions. For example, the pH of blood is 7.4, if blood falls to 6.8 or lower or 8.2 or higher, it results in death.
A. the amount of lean muscle in a body
The electrical charge is negative
If both sides are loose then you do have a possibility of swallowing it, although not necessarily in your sleep. Just be careful when you wake up. Also, if it's loose on one side it won't fall.